51719731 has 8 divisors (see below), whose sum is σ = 61146720. Its totient is φ = 42802368.

The previous prime is 51719711. The next prime is 51719741. The reversal of 51719731 is 13791715.

51719731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51719731 - 2¹¹ = 51717683 is a prime.

It is a super-2 number, since 2×51719731² = 5349861149424722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51719711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127186 + ... + 127591.

It is an arithmetic number, because the mean of its divisors is an integer number (7643340).

Almost surely, 2^51719731 is an apocalyptic number.

51719731 is a deficient number, since it is larger than the sum of its proper divisors (9426989).

51719731 is a wasteful number, since it uses less digits than its factorization.

51719731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254813.

The product of its digits is 6615, while the sum is 34.

The square root of 51719731 is about 7191.6431363076. The cubic root of 51719731 is about 372.5793257782.

The spelling of 51719731 in words is "fifty-one million, seven hundred nineteen thousand, seven hundred thirty-one".